The younger brother is a playboy type in contrast to her husband, and Nanami hasn't thought about it for a long time, but Nanami also wants to have a child, and she reluctantly accepts her husband's request. Although I didn't really want to have sexual intercourse with my brother-in-law, I had some hope that I might get pregnant. However, as the body piles up, the brother-in-law becomes accustomed to Nanami. Even if I asked for modest contact, I asked for Nanami's body by saying "because my brother asked me" and "for making children".